Lifting appliance structure of gantry crane

Abstract

The invention relates to the technical field of cranes, in particular to a gantry crane lifting appliance structure which comprises a grab bucket unit, the grab bucket unit comprises a central shaft and two symmetrically arranged grab buckets rotationally mounted on the central shaft, two symmetrically arranged material removing units are mounted on the central shaft, and knocking units are mounted on the material removing units; materials adhered in the grab bucket are removed in a shoveling mode when the grab bucket is used for unloading, so that the situation that the effective loading capacity of the grab bucket is reduced due to excessive materials adhered in the grab bucket is prevented, the loading, unloading and transferring efficiency of the materials is ensured, meanwhile, the materials adhered in the grab bucket are further ensured to be thoroughly removed in cooperation with knocking vibration, and the working efficiency of the grab bucket is improved. Cross contamination among different materials is prevented when the materials of different types are loaded, unloaded and transferred, and the quality of the materials is ensured; in addition, the amount of the grabbed materials can be accurately controlled when the grab bucket loads and unloads the materials, overload of the grab bucket is prevented, and the stability of the grab bucket during working is ensured.

Description

Technical Field

[0001] This invention relates to the field of crane technology, specifically a gantry crane lifting device structure. Background Technology

[0002] In industrial settings such as ports, mines, power plants, and large bulk cargo yards, the loading, unloading, and transfer of bulk materials such as coal, grain, and cement clinker are key links supporting the continuous operation of production processes. Bulk materials are characterized by large quantities and bulk stacking, requiring lifting equipment such as gantry cranes for large-scale handling. Among them, grab buckets, as the actuators of gantry cranes that directly contact materials, directly determine the overall operational efficiency through their grabbing and unloading efficiency. They are widely used in bulk carrier loading and unloading, material stacking, and workshop material transfer scenarios.

[0003] The grab bucket lifting device of existing gantry cranes typically includes a central shaft and two grab buckets symmetrically mounted on the central shaft. The grab buckets can be controlled by a drive system to rotate around the central shaft, realizing the opening and closing action of the grab buckets. During operation, the drive system drives the two grab buckets to rotate around the central shaft to opposite sides, using the arc-shaped bucket walls of the grab buckets to form a closed space to grab materials. After the crane transfers the materials to the target unloading point, the drive system reverses its action, causing the two grab buckets to rotate to opposite sides, allowing the materials inside the grab buckets to be naturally discharged from the bottom discharge port under the action of gravity, completing the loading, unloading and transfer of materials.

[0004] Existing grab bucket spreaders have the following problems when loading, unloading, and transferring materials: When loading, unloading, and transferring materials with high adhesion, relying solely on gravity to unload the grabbed material, some material tends to adhere to the inner surface of the grab bucket during unloading. If too much material remains in the grab bucket, the effective loading capacity of the grab bucket is reduced, thus decreasing the efficiency of loading, unloading, and transferring materials. Furthermore, when loading, unloading, and transferring different types of materials, the material adhering to the grab bucket may cause cross-contamination between different materials, affecting the quality of the materials. In addition, existing grab bucket spreaders cannot precisely control the amount of material grabbed by the grab bucket, leading to the problem of overloading the grab bucket and affecting the stability of the grab bucket during operation. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a gantry crane lifting device structure, including a grab bucket unit, the grab bucket unit including a central shaft, two symmetrically arranged grab buckets rotatably mounted on the central shaft, two symmetrically arranged material removal units mounted on the central shaft, and a striking unit mounted on the material removal unit; the material removal unit includes an inclined pusher plate mounted on the central shaft, a plurality of fixed shovels evenly arranged front and back fixedly mounted on the lower end of the pusher plate near the grab bucket, and a plurality of movable shovels evenly arranged front and back slidingly mounted via a reciprocating assembly, the movable shovels being located below the fixed shovels, and the movable shovels and fixed shovels being arranged alternately front and back; the striking unit includes a fixed Two symmetrically arranged fixed plates are installed on the side of the pusher plate away from the grab bucket. A flexible striking rod is slidably mounted through and on each fixed plate, with a cooperating assembly installed on the striking rod. A reciprocating rod is mounted on the reciprocating assembly. Multiple pushing blocks are fixedly installed on the front and rear inner walls of the grab bucket, evenly arranged along an arc. When the grab bucket rotates to the opposite side to unload material, the pusher plate simultaneously pushes the material towards the discharge port. The pushing blocks and reciprocating rods work together to drive the movable shovel plate to move back and forth via the reciprocating assembly. Simultaneously, the reciprocating rod and the cooperating assembly work together to cause the flexible striking rod to strike and vibrate the grab bucket. This combination of the fixed shovel plate, the reciprocating movable shovel plate, and the striking vibration of the flexible striking rod thoroughly removes the material adhering to the inside of the grab bucket.

[0006] Preferably, the front and rear ends of the pusher plate are provided with clearance grooves corresponding to the positions of the push blocks, the side of the push block away from the end of the grab bucket is set as trapezoidal, and multiple push blocks corresponding to the front and rear inner walls of the grab bucket are arranged alternately along an arc trajectory.

[0007] Preferably, the reciprocating assembly includes a reciprocating plate that is slidably mounted on the pusher plate, a movable shovel plate that is fixedly mounted on the reciprocating plate, an L-shaped transmission plate that is fixedly mounted on the side of the reciprocating plate away from the movable shovel plate, a section of the L-shaped transmission plate that is not connected to the reciprocating plate that slides through the pusher plate, and the upper end of the L-shaped transmission plate is fixedly connected to the reciprocating rod.

[0008] Preferably, a guide block is fixedly installed in the middle of the pusher plate on the side away from the grab bucket, and a section of the L-shaped transmission plate and the reciprocating rod slides through the guide block. A return spring is connected between the front and rear sides of the L-shaped transmission plate and the guide block.

[0009] Preferably, a square plate is fixedly installed at the lower end of the multiple movable shovels, and multiple scrapers evenly arranged front and back are fixedly installed at the lower end of the square plate.

[0010] Preferably, the two elastic striking rods are provided with inclined grooves on opposite sides, and two symmetrically arranged levers are fixedly installed at the lower end of the reciprocating rod. The mating assembly includes an elastic mating rod fixedly installed at the upper end of the opposite side of the two elastic striking rods. The upper end of the telescopic section of the elastic mating rod is provided with an inclined surface that mates with the levers.

[0011] Preferably, a pressing rod is fixedly installed on the side of the elastic coupling rod telescopic section near the pusher plate, and two pressing blocks are fixedly installed on the side of the pusher plate away from the grab bucket. The pressing blocks are triangular, and the inclined surface of the pressing blocks can cooperate with the pressing rod to compress the elastic coupling rod telescopic section.

[0012] Preferably, the pusher plate is rotatably connected to the central shaft via a connecting sleeve. An adjustment group is installed on the central shaft. The adjustment group is used to adjust the position of the two pusher plates via the connecting sleeve, thereby controlling the amount of material grabbed by the grab bucket.

[0013] Preferably, the adjustment group includes two locking plates symmetrically arranged front and back, which are fixedly sleeved on the outside of the central shaft, and locking holes are opened on the upper side of both the front and rear ends of the locking plates.

[0014] Preferably, a circular plate is fixedly fitted on one end of the connecting sleeve near the corresponding locking plate. Multiple threaded holes are evenly arranged along an arc trajectory on the upper side of the circular plate. A detachable locking pin is threaded into the threaded hole. The locking pin is used to lock the position of the circular plate by cooperating with the locking hole.

[0015] The beneficial effects of this invention are as follows: First, this invention uses a shovel method to remove material adhering to the inside of the grab bucket during unloading, thereby preventing excessive material adhering to the grab bucket from reducing its effective loading capacity and ensuring the efficiency of loading, unloading, and transferring materials. At the same time, the combined use of knocking and vibration further ensures the thorough removal of material adhering to the grab bucket, preventing cross-contamination between different materials during loading, unloading, and transferring, and ensuring the quality of the materials. In addition, this invention can also precisely control the amount of material grabbed by the grab bucket during loading and unloading, preventing the grab bucket from overloading and ensuring the stability of the grab bucket during operation.

[0016] Second, the material removal unit of the present invention can remove and clean the material adhering to the grab bucket when the grab bucket is unloading. The fixed shovel plate of the material removal unit can first remove and clean the material adhering to the grab bucket, and then the movable shovel plate that moves back and forth can remove and clean the material adhering to the grab bucket a second time. Thus, the material adhering to the grab bucket is completely removed through the two removal and cleaning by the material removal unit.

[0017] Third, the elastic striking rod of the striking unit of the present invention can synchronously and continuously strike and vibrate the grab bucket when the grab bucket is unloading, so that the fixed shovel plate, the reciprocating movable shovel plate and the striking vibration of the elastic striking rod are coordinated to further ensure the thorough removal of the material adhering to the grab bucket.

[0018] Fourth, when the movable shovel moves back and forth, the scraper of the present invention can scrape off the material adhering to the grab bucket, thereby improving the removal effect of the material adhering to the grab bucket.

[0019] Fifth, the adjustment group of this invention can adjust the position of the two pusher plates so that when the grab bucket grabs material, the maximum volume of material grabbed by the grab bucket is the space between the two grab buckets and the two pusher plates, thereby controlling the amount of material grabbed by the grab bucket, preventing the grab bucket from being overloaded, and ensuring the stability of the grab bucket during operation. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0022] Figure 2 This is a cross-sectional view of the present invention.

[0023] Figure 3 This is a three-dimensional structural diagram of a grab bucket, its corresponding striking unit, and a pusher plate according to the present invention.

[0024] Figure 4 This is a three-dimensional structural diagram of the pusher plate, fixed shovel plate, and movable shovel plate of the present invention.

[0025] Figure 5 This is a first cross-sectional view of the grab bucket and pushing block of the present invention.

[0026] Figure 6 This is a second cross-sectional view of the grab bucket and pushing block of the present invention.

[0027] Figure 7 This is a cross-sectional view of the pusher plate, reciprocating plate, L-shaped transmission plate, guide block, and reciprocating rod of the present invention.

[0028] Figure 8 This is a three-dimensional structural diagram of the pusher plate, reciprocating rod, and elastic striking rod after the guide block has been partially removed, according to the present invention.

[0029] Figure 9 This is a three-dimensional structural diagram of the elastic striking rod, elastic cooperating rod, and pressing rod of the present invention.

[0030] Figure 10 This is a cross-sectional view of the central shaft, connecting sleeve, circular plate, locking pin, and locking plate of the present invention.

[0031] Figure 11 This is a three-dimensional structural diagram of the pusher plate, reciprocating plate, and movable shovel plate of the present invention.

[0032] Reference numerals: 1. Grab unit; 11. Central shaft; 12. Grab; 121. Pushing block; 13. Adjustment group; 131. Locking plate; 132. Locking hole; 2. Material removal unit; 21. Pushing plate; 211. Guide block; 212. Return spring; 213. Lowering block; 214. Connecting sleeve; 215. Circular plate; 216. Locking pin; 217. Relief groove; 22. Fixed shovel plate; 23. Reciprocating group; 231. Reciprocating plate; 232. L-shaped transmission plate; 24. Movable shovel plate; 241. Scraper; 25. Reciprocating rod; 251. Pulley plate; 3. Striking unit; 31. Fixed plate; 32. Elastic striking rod; 33. Coordination group; 331. Elastic coordination rod; 332. Lowering rod. Detailed Implementation

[0033] The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Where no specific technology or conditions are specified in the embodiments, they shall be performed in accordance with the technology or conditions described in the literature in the field or in accordance with the product manual.

[0034] See Figure 1 and Figure 2 A gantry crane lifting device structure includes a grab bucket unit 1. The grab bucket unit 1 includes a central shaft 11 and two symmetrically arranged grab buckets 12 rotatably mounted on the central shaft 11. Two symmetrically arranged material removal units 2 are installed on the central shaft 11, and a knocking unit 3 is installed on the material removal unit 2.

[0035] It should be noted that the loading, unloading and transfer of the grab bucket unit 1 is existing technology. Its working principle, control method and structural settings are the same as existing technology, so they will not be described again in this invention.

[0036] See Figure 1 , Figure 2 and Figure 4 The material removal unit 2 includes an inclined pusher plate 21 mounted on the central shaft 11. Multiple fixed shovels 22 are fixedly installed on the side of the lower end of the pusher plate 21 near the grab bucket 12. Multiple movable shovels 24 are slidably installed on the front and back of the grab bucket 12 via a reciprocating assembly 23. The movable shovels 24 are located below the fixed shovels 22, and the movable shovels 24 and the fixed shovels 22 are arranged alternately. A reciprocating rod 25 is installed on the reciprocating assembly 23. Multiple pushing blocks 121 are fixedly installed on the front and back inner walls of the grab bucket 12 along an arc. The material removal unit 2 can remove the material adhering to the inside of the grab bucket 12, thereby preventing the effective loading capacity of the grab bucket 12 from being reduced due to excessive material adhering to the grab bucket 12, and ensuring the efficiency of loading, unloading and transfer of materials.

[0037] See Figure 3The striking unit 3 includes two fixed plates 31 arranged symmetrically front to back and fixedly installed on the side of the pusher plate 21 away from the grab bucket 12. An elastic striking rod 32 is installed through and slidably on the fixed plate 31. A mating assembly 33 is installed on the elastic striking rod 32. The striking unit 3 can continuously strike and vibrate the grab bucket 12, thereby ensuring that the material adhering to the inner surface of the grab bucket 12 is thoroughly removed, preventing cross-contamination between different materials when loading, unloading and transferring different types of materials, and ensuring the quality of the materials.

[0038] Specifically, when loading, unloading, and transferring materials, the gantry crane is controlled to move the grab bucket 12 to the designated material grabbing position, and the two grab buckets 12 are controlled to rotate towards opposite sides to grab the material. Then, the gantry crane is controlled to move the grab bucket 12 to the unloading position, and the two grab buckets 12 are controlled to rotate towards opposite sides to unload the material. Since the pusher plate 21 is in a fixed state, it synchronously pushes the material towards the discharge port, which is conducive to the rapid removal of the material from the grab bucket 12. The fixed shovel plate 22 can first remove the material adhering to the grab bucket 12, achieving the initial removal of the material adhering to the grab bucket 12. Then, the pusher plate 21 drives the movable shovel plate 24 to remove the material adhering to the grab bucket 12 a second time. Since the movable shovel plate 24 and the fixed shovel plate 22 are arranged in a staggered manner, and the pusher block 121 and the reciprocating rod 25 cooperate to drive the movable shovel plate 24 to move back and forth through the reciprocating assembly 23, it is ensured that the movable shovel plate 24 and the fixed shovel plate 22 can completely remove the material adhering to the grab bucket 12.

[0039] Simultaneously, the reciprocating rod 25 and the cooperating assembly 33 work together to cause the elastic striking rod 32 to strike and vibrate the grab bucket 12. This allows the fixed shovel plate 22, the reciprocating movable shovel plate 24, and the striking vibration of the elastic striking rod 32 to work together to thoroughly remove the material adhering to the grab bucket 12. By repeating the above steps, continuous loading, unloading, and transfer of materials can be achieved.

[0040] In order for the movable shovel plate 24 to move continuously back and forth, the present invention adopts the following structure: (See reference) Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8The pusher plate 21 has clearance grooves 217 at both ends corresponding to the positions of the push blocks 121. The side of the push block 121 away from the end of the grab bucket 12 is trapezoidal, and multiple push blocks 121 corresponding to the inner walls of the grab bucket 12 are arranged alternately along an arc trajectory. The reciprocating assembly 23 includes a reciprocating plate 231 that is slidably mounted on the pusher plate 21. A movable shovel plate 24 is fixedly mounted on the reciprocating plate 231. An L-shaped transmission plate 232 is fixedly mounted on the side of the reciprocating plate 231 away from the movable shovel plate 24. A section of the transmission plate 232 not connected to the reciprocating plate 231 slides back and forth through the pusher plate 21. The upper end of the L-shaped transmission plate 232 is fixedly connected to the reciprocating rod 25. A guide block 211 is fixedly installed in the middle of the side of the pusher plate 21 away from the grab bucket 12. A section of the L-shaped transmission plate 232 connected to the reciprocating rod 25 slides back and forth through the guide block 211. Return springs 212 are connected between the front and rear sides of the L-shaped transmission plate 232 and the guide block 211. The front and rear ends of the reciprocating rod 25 are set as hemispherical. See reference. Figure 11 A bellows cover is installed at the sliding connection between the reciprocating plate 231 and the pusher plate 21 to prevent material from entering the sliding connection between the reciprocating plate 231 and the pusher plate 21.

[0041] Specifically, when the two grabs 12 rotate to opposite sides to unload materials, the grabs 12 drive the push blocks 121 to rotate. When the trapezoidal structure of the push blocks 121 moves to contact the end of the reciprocating rod 25 and continues to rotate, the inclined surface of the trapezoidal structure of the push blocks 121 pushes the reciprocating rod 25 to move away from the push blocks 121. Since the multiple push blocks 121 corresponding to the front and rear inner walls of the grabs 12 are arranged in an alternating arc trajectory, the push blocks 121 on the front and rear inner walls of the grabs 12 can push the reciprocating rod 25 to move in sequence, so that the reciprocating rod 25 moves back and forth continuously. The reciprocating rod 25 drives the reciprocating plate 231 to move back and forth continuously through the L-shaped transmission plate 232, so that the reciprocating plate 231 drives the movable shovel plate 24 to move back and forth continuously, increasing the removal effect of the movable shovel plate 24 on the material adhering to the inner wall of the grabs 12.

[0042] To further ensure the complete removal of material adhering to the grab bucket 12, the present invention adopts the following structure: (See attached diagram) Figure 2 and Figure 4 Multiple movable shovels 24 are fixedly mounted on a square plate at their lower ends, and multiple scrapers 241 evenly arranged in front and behind are fixedly mounted on the lower end of the square plate. When the movable shovels 24 move back and forth, the movable shovels 24 drive the scrapers 241 to move back and forth through the square plate, so that the scrapers 241 can scrape off the material adhering to the grab bucket 12.

[0043] See Figure 3 , Figure 8 and Figure 9Both the front and rear elastic striking rods 32 have inclined grooves on opposite sides. The lower end of the reciprocating rod 25 is fixedly installed with two symmetrically arranged paddle plates 251. The mating assembly 33 includes an elastic mating rod 331 fixedly installed on the upper end of the opposite side of the two elastic striking rods 32. The upper end of the telescopic section of the elastic mating rod 331 has an inclined surface that cooperates with the paddle plate 251. Initially, the two elastic mating rods 331 are located between the two paddle plates 251. A pressing rod 332 is fixedly installed on the side of the telescopic section of the elastic mating rod 331 near the pusher plate 21. Two symmetrically arranged pressing blocks 213 are fixedly installed on the side of the pusher plate 21 away from the grab bucket 12. The pressing blocks 213 are triangular. The inclined surface of the pressing blocks 213 can cooperate with the pressing rod 332 to compress the telescopic section of the elastic mating rod 331.

[0044] Specifically, when the two grab buckets 12 rotate to opposite sides to unload materials, the grab buckets 12 can push the inclined surface of the corresponding elastic striking rod 32, so that the telescopic section of the elastic striking rod 32 is compressed and pressed against the inside of the grab bucket 12. The elastic striking rod 32 has a certain amount of compression. When the reciprocating rod 25 moves forward, the reciprocating rod 25 drives the rear elastic cooperating rod 331 to move forward through the rear deflector plate 251, so that the elastic cooperating rod 331 drives the rear elastic striking rod 32 to move forward and accumulate elastic potential energy. When the elastic cooperating rod 331 drives the pressing rod 332 to move to contact the inclined surface of the triangle of the pressing block 213 and continues to move, the inclined surface of the triangle of the pressing block 213 pushes the pressing rod 332 to move downward, so that the telescopic section of the elastic cooperating rod 331 is compressed and separated from the deflector plate 251, so that the rear elastic striking rod 32 quickly strikes and vibrates the grab bucket 12 under its elastic action, assisting in removing the material adhering inside the grab bucket 12.

[0045] Simultaneously, when the reciprocating rod 25 moves backward, the elastic striking rod 32 located on the front side quickly strikes the vibrating grab bucket 12, and the reciprocating rod 25 can drive the deflector plate 251 to push the inclined surface of the telescopic section of the elastic coupling rod 331, so that the telescopic section of the elastic coupling rod 331 is compressed, and the deflector plate 251 located on the rear side moves to the rear of the elastic coupling rod 331. Thus, when the reciprocating rod 25 moves forward, the elastic striking rod 32 located on the rear side can strike the vibrating grab bucket 12 quickly again, thereby achieving continuous striking of the vibrating grab bucket 12.

[0046] To precisely control the amount of material grabbed by the grab bucket 12 during loading and unloading, the present invention adopts the following structure: (See attached diagram) Figure 1 and Figure 2The pusher plate 21 is rotatably connected to the central shaft 11 via the connecting sleeve 214. An adjustment group 13 is installed on the central shaft 11. Before the grab bucket 12 loads, unloads and transfers materials, the control adjustment group 13 adjusts the position of the two pusher plates 21 via the connecting sleeve 214 so that when the grab bucket 12 grabs materials, the maximum volume of materials grabbed by the grab bucket 12 is the space between the two grab buckets 12 and the two pusher plates 21, thereby controlling the amount of materials grabbed by the grab bucket 12, preventing the grab bucket 12 from being overloaded, and ensuring the stability of the grab bucket 12 during operation.

[0047] To precisely control the amount of material grabbed by the grab bucket 12, the present invention adopts the following structure: (See attached diagram) Figure 1 and Figure 10 The adjusting assembly 13 includes two locking plates 131 symmetrically arranged front and back, which are fixedly sleeved on the outside of the central shaft 11. Locking holes 132 are opened on the upper side of both the front and rear ends of the locking plates 131. A circular plate 215 is fixedly sleeved on one end of the connecting sleeve 214 near the corresponding locking plate 131. Multiple threaded holes are opened on the upper side of the circular plate 215 along an arc trajectory. A detachable locking pin 216 is threaded in the threaded hole. The locking pin 216 is used to lock the position of the circular plate 215 by cooperating with the locking hole 132.

[0048] It should be noted that one of the pusher plates 21 is rotatably connected to the central shaft 11 via a connecting sleeve 214 located in the middle of the central shaft 11, and the other pusher plate 21 is rotatably connected to the central shaft 11 via two connecting sleeves 214 located on the front and rear sides of the central shaft 11.

[0049] Specifically, when the position of the pusher plate 21 needs to be adjusted, first screw on the locking pin 216 to remove it from the threaded hole and the locking hole 132. Then, manually rotate the two pusher plates 21 to adjust their positions. The pusher plate 21 drives the circular plate 215 to rotate through the connecting sleeve 214. After the position of the pusher plate 21 is adjusted, screw on the locking pin 216 and insert it into the corresponding threaded hole and the locking hole 132 in sequence. This allows the locking pin 216 and the locking hole 132 to lock the position of the circular plate 215, thereby locking the position of the pusher plate 21. This achieves precise adjustment of the position of the pusher plate 21, and thus precisely controls the space between the two grabs 12 and the two pusher plates 21.

[0050] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0051] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0052] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, or a sliding connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0053] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A gantry crane lifting device structure, comprising a grab bucket unit, the grab bucket unit including a central shaft and two symmetrically arranged grab buckets rotatably mounted on the central shaft, characterized in that, Two symmetrically arranged material removal units are installed on the central axis, and each material removal unit is equipped with a striking unit. The material removal unit includes an inclined pusher plate mounted on the central shaft. Multiple fixed shovels are fixedly installed on the side of the lower end of the pusher plate near the grab bucket. Multiple movable shovels are slidably installed on the side of the reciprocating assembly. The movable shovels and fixed shovels are arranged alternately. The striking unit includes two fixed plates arranged symmetrically front to back, which are fixedly installed on the side of the pusher plate away from the grab bucket. An elastic striking rod is installed through and sliding back and forth on the fixed plates, and a matching assembly is installed on the elastic striking rod. The reciprocating assembly is equipped with a reciprocating rod, and multiple pushing blocks are fixedly installed on the front and rear inner walls of the grab bucket, evenly arranged along an arc. When the grab bucket rotates to the opposite side to unload, the pusher plate pushes the material to gather at the discharge port. The pushing blocks and the reciprocating rod work together to drive the movable shovel plate to move back and forth. At the same time, the reciprocating rod and the cooperating assembly work together to make the elastic striking rod strike and vibrate the grab bucket, so that the fixed shovel plate, the movable shovel plate and the elastic striking rod work together to completely remove the material adhering to the grab bucket.

2. The gantry crane lifting device structure according to claim 1, characterized in that, The pusher plate has clearance grooves at the front and rear ends corresponding to the positions of the push blocks. The side of the push block away from the end of the grab bucket is set as a trapezoid, and multiple push blocks corresponding to the front and rear inner walls of the grab bucket are arranged alternately along an arc trajectory.

3. The gantry crane lifting device structure according to claim 1, characterized in that, The reciprocating assembly includes a reciprocating plate that is slidably mounted on a pusher plate, a movable shovel plate that is fixedly mounted on the reciprocating plate, and an L-shaped transmission plate that is fixedly mounted on the side of the reciprocating plate away from the movable shovel plate. A section of the L-shaped transmission plate that is not connected to the reciprocating plate slides through the pusher plate. The upper end of the L-shaped transmission plate is fixedly connected to the reciprocating rod.

4. The gantry crane lifting device structure according to claim 3, characterized in that, A guide block is fixedly installed in the middle of the pusher plate on the side away from the grab bucket. A section of the L-shaped transmission plate and the reciprocating rod slides through the guide block. Return springs are connected between the front and rear sides of the L-shaped transmission plate and the guide block.

5. The gantry crane lifting device structure according to claim 1, characterized in that, A square plate is fixedly installed at the lower end of multiple movable shovels, and multiple scrapers evenly arranged front and back are fixedly installed at the lower end of the square plate.

6. The gantry crane lifting device structure according to claim 1, characterized in that, Both of the front and rear elastic striking rods have inclined grooves on opposite sides. Two symmetrically arranged levers are fixedly installed at the lower end of the reciprocating rod. The mating assembly includes an elastic mating rod fixedly installed at the upper end of the opposite side of the two front and rear elastic striking rods. The upper end of the telescopic section of the elastic mating rod has an inclined surface that mates with the levers.

7. The gantry crane lifting device structure according to claim 6, characterized in that, A pressing rod is fixedly installed on the side of the elastic coupling rod telescopic section near the pusher plate. Two pressing blocks are fixedly installed on the side of the pusher plate away from the grab bucket. The pressing blocks are triangular, and the inclined surface of the pressing blocks can cooperate with the pressing rod to compress the elastic coupling rod telescopic section.

8. The gantry crane lifting device structure according to claim 1, characterized in that, The pusher plates are rotatably connected to the central shaft via a connecting sleeve. An adjustment group is installed on the central shaft. The adjustment group is used to adjust the position of the two pusher plates through the connecting sleeve, thereby controlling the amount of material grabbed by the grab bucket.

9. The gantry crane lifting device structure according to claim 8, characterized in that, The adjustment assembly includes two locking plates symmetrically arranged front and back, which are fixedly sleeved on the outside of the central shaft. Locking holes are provided on the upper sides of both the front and rear ends of the locking plates.

10. A gantry crane lifting device structure according to claim 9, characterized in that, Each connecting sleeve has a circular plate fixedly fitted on one end near the corresponding locking plate. Multiple threaded holes are evenly arranged along an arc trajectory on the upper side of the circular plate. A detachable locking pin is threaded into the threaded hole. The locking pin is used to lock the position of the circular plate by cooperating with the locking hole.

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